Solar heater



Dec. 22, 1931. C, F; KUNZ 1,837,449

SOLAR HEATER Filed Aug. 17, 1927 Inventor PatentedDec. 22, 1931 l Y y. l

UNITED `STATES PATENT ojFFicE VCARL F. Kunz,` or rioniirir,-Aitizoiwi-l l t l l Y l l Y soLAnHnrEnff Y Application ied August i7,lel7irlflslferiai Y2 1 3,5'V?`4, p Y l l The present invention relates to aA solar which remain roundwith liaiigeslQ heater and has for its prime object to pro-V olearlyshown in Figure 6L The' heater tubes vide animproved structure which provides are connectfedby means of bolts 4 extending a large conductive surface in proportion to throughthe angeZand the return fitting 3.

. `l the amount of liquids contained in the con- 1 The inletelbowr andthe outlet elbow are con- 55,- y

duits thereof. -Another very important obneet-eid to the endsof the outer heater tubes ject of the inventionV resides in the provision Vby bolts. 4t extending through the flange 2 of a solar heater including-:a pan with con-V and the inlet or outlet elbow 5, clamping the ductois or tubes mounted therein and cou.- langed endof the U-shaped tube between the y 10 pled together in such a manner as to profitting andthe flange.

0 outlet or inlet elbows,

vide a comparatively compact Vand rigid f The tubesare anchored to the bottom of the structure. a pan by means of brackets 14 andthe fittings Another very importantobject of the in- 3 and 5 are disposed over the trough 11. vention resides in the provision, of a solar These heater tubes lose none of their eX- heater comprising alpan with tubes arranged posure of conductive surface through form- 5 therein, said tubes being constructed to Vwithing the same into a U-shape, but gain in heatstand the expansion of the liquids. e ing capacity as they allow for a narrow cres- A further Very mp01tant-0bjecf, 0f Cent-Shaped Space between. the heatllgWillS the invention resides in the provision of a of the tubes as may be desired to contain the solar heater which is simple in its construcliquid JC0 be heated. The U-Shaped tubes are 70 tion, thoroughly eiiicientand reliable in use, lnvertedwith respect to the pan 10, incline strong and durable7 and otherwise well in opposite directions from one anothervand adapted t0 the purpose for which it is d@ areV disposed in the same plane to promote the Si ned, :tree flowing of the convection current of u ith the abovg and numerous other Objects llqulCl'tllIOugh the tubes. .These heater tubes '[5 iii view as will appear as the description pro- 111 thell U-Shaped formation and the return ceeds, the invention resides incertain novel tlQgS and GUOOWS Wlth 1311811 backs Indicated features of construction, and inthe combina- Spelally by the letters B being bulged intion and arrangement of parts as will be Welfdya Ope'ete bke dlalehfagms undef eX- hereinafter more fully described and claimed. `CeSS1Ye I )IeSSllIeaIld pelIIllt the epanSlOn 0f 80 In the drawings v the liquid contained in the conduits, thus a1- vFigure 1 is a` fragmentary Plan View 0f a lowing contraction and expansion to take solar heater embodying the vfeatures of my Place Wltheut danger 0f breakage t0 the" invention, A Y heater. u Figure 2 is a Sectional `Viw through a re-' It will also be seen that these tubes afford 85 turn fitting for connecting the heater tubes,. e feltlVely large e0I1d1let1Ve-S111flCe 111 PIO- Figure 3 is a transverse section taken sub- Formel1 t0 the 'amount of hqmd @Deemed stantially on the line 3 3 of Figure 2, 'the1'e111- Figure 4 is a section through one of the 'Y The prtent embodiment of the invention l has been disclosed in detail merely by way of V Figure 5 is a Section taken Substantially example, since in actual practice it attains Jche on the line 5 5 of Figure 4, and! y features of advantage `enumerated as desir- Fgure 6 is a detail Section through one able in the statement of the invention taken tvoend of one of the Ymbe i gether withv the above description. It will be I 5 vReferring to the drawings in detail itwill appellent that ,Changes '1n the defa'lls 0f een.' 0 be seen that the numeral l() denotes a pany Stllletlon and m the reomblnetlel and 211'- having troughsv 11 atvthe opposite ends thereelgemene 0f Part/S may b e resorted t0 Wlth p of. The pan contains a plurality of heater 91113 deprtlngfrom the spirit or scope ofthe tubes l which are made from round tubing, invention as hereinafter claimed or sacricrolled or pressed into a U-shape, except atfthe ing any of its advantages. 10C

Having thus described my invention, what I claim as new is A solar heater of the class described comprising a tray having a trough at each end thereof, a plurality of pairs of tubes extending across the bottom of the tray, the tubes of each pair being convergently arranged, headers located in one of the troughs and oonnecting the tubes of the pairs together, headers located in the other trough, each Connecting a tube of one pair With a tube of another pair, an inlet member connected to one of the outermost tubes, an outlet memberoonnected to the other outermost tube, the major portion of each tube being bent into kcrescent shape with its convexed portion uppermost and the ends of each tube being cylindrical shaped and engaging the headers.

In testimony whereof I affix my signature.

y CARL F. KUNZ. 

